package com.fishleap.number;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

import java.io.IOException;

/**
 * @author zlg
 */
public class NumberDriver {

    public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {
        // 输入输出路径需要根据自己电脑上实际的输入输出路径设置
        args = new String[]{"E:/develop/skillStudy/tempData/number",
                "E:/develop/skillStudy/output"};
        // 1.获取配置信息以及封装任务
        Configuration configuration = new Configuration();
        Job job = Job.getInstance(configuration);
        // 2.设置jar加载路径
        job.setJarByClass(NumberDriver.class);
        // 3.设置map和reduce类
        job.setMapperClass(NumberMapper.class);
        job.setReducerClass(NumberReducer.class);
        // 4.设置map输出
        job.setMapOutputKeyClass(IntWritable.class);
        job.setMapOutputValueClass(IntWritable.class);
        // 5.设置最终输出kv类型
        job.setOutputKeyClass(IntWritable.class);
        job.setOutputValueClass(IntWritable.class);
        // 6.设置输入和输出路径
        FileInputFormat.setInputPaths(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
        // 7.提交
        boolean result = job.waitForCompletion(true);
        System.exit(result ? 0 : 1);
    }
}
